Special Report

50 Most Dangerous Volcanoes in America

Thomas C. Frohlich

Source: jomilo75 / Flickr

25. Kanaga, Alaska
> Threat score: 102
> Last eruption year: 2012
> Pop. within 30 km: 0
> Pop. within 100 km: 0

Source: naql / Flickr

24. Shishaldin, Alaska
> Threat score: 104
> Last eruption year: 2015
> Pop. within 30 km: 10
> Pop. within 100 km: 197

Source: Vipersniper / Getty Images

23. Iliamna, Alaska
> Threat score: 106
> Last eruption year: 1876
> Pop. within 30 km: 1
> Pop. within 100 km: 7,564

Source: US Forest Service

22. Inyo Craters, California
> Threat score: 106
> Last eruption year: 1380.
> Pop. within 30 km: 9,048
> Pop. within 100 km: 82,160

Source: Ajith Kumar / iStock

21. Yellowstone, Wyoming
> Threat score: 107
> Last eruption year: 1350 B.C.
> Pop. within 30 km: 234
> Pop. within 100 km: 20,692